Update bmusb to a version that does not need to be embedded.

[nageru] / bmusb

diff --git a/bmusb b/bmusb
index 96c41434726ef4b603f58cc3cafbb1630bea269e..c9b69bb5d130dbb707939c714c8bbe1d41c1153c 160000 (submodule)
--- a/bmusb
+++ b/bmusb
@@ -1 +1 @@
-Subproject commit 96c41434726ef4b603f58cc3cafbb1630bea269e
+Subproject commit c9b69bb5d130dbb707939c714c8bbe1d41c1153c